Authors
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Sawsan M. Ahmed
This study aimed to point out the effect of increased back fat (BF) on leptin, insulin, progesterone (P4), and estrogen (E2) hormones, as well as pregnancy rates in goats. We hypothesized that BF thickness influences hormonal profiles and reproductive performance. Goats (N=45) of mixed breeds were classified into obese (N=15), moderate (N=18), and lean goats (N=12). Obese females were fed rationfree- concentrate for one month (green clover) ad libitum. After the dietary regime, all females were kept with fertilizable males until pregnancy was detected 30 days later. Ovarian follicles diameters and numbers were also compared. Our results revealed that obese goats before restricting diets had the highest BF (2.69±0.39 mm; P≤0.0001), corpus luteum diameter (CL, P<0.01; 1.05±0.12); leptin concentration (P<0.01; 1.79±0.13); total follicles (5.89±0.27; P<0.0001), number of large follicles (P<0.05; 1.45±1.24), medium follicles (P<0.01; 1.55±0.74). After diet restriction, obese and moderate BF goats had nearly the same BF, P4, and leptin concentration. Compared to goats with moderate BF, replacing concentrated ration with green clover for 30 days increased CL diameter, area, total ovarian activity, number of large and medium follicles, and the diameter of large follicles. Goats of moderate BF, obese dietary restricted, and lean ones had 46%, 31%, and 23% pregnancy rates respectively. In conclusion, obesity can be detected by determining BF and leptin hormone. Obesity is associated with disturbed leptin, insulin and ovarian hormones, ovarian follicle growth, luteal development as well as reduced pregnancy rates. Diet free from concentrated reduced back fat and improved pregnancy outcomes.
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Amal M. Abo El-Maaty
Animal Reproduction and AI Dept., Veterinary Research Institute, National Research Centre, 33 El- Buhouth Street, P.O: 12622, Dokki, Giza, Egypt.
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Hamed A.A. Omer
Animal Production Department, Agricultural & Biological Research Institute, National Research Centre, 33 El-Buhouth Street, P.O: 12622, Dokki, Giza, Egypt.
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Hazem A. El- Debaky
Animal Reproduction and AI Dept., Veterinary Research Institute, National Research Centre, 33 El- Buhouth Street, P.O: 12622, Dokki, Giza, Egypt.
Keywords:
leptin, insulin, ovarian hormones, pregnancy, obesity, goats
Abstract
This study aimed to point out the effect of increased back fat (BF) on leptin, insulin, progesterone (P4), and estrogen (E2) hormones, as well as pregnancy rates in goats. We hypothesized that BF thickness influences hormonal profiles and reproductive performance. Goats (N=45) of mixed breeds were classified into obese (N=15), moderate (N=18), and lean goats (N=12). Obese females were fed rationfree- concentrate for one month (green clover) ad libitum. After the dietary regime, all females were kept with fertilizable males until pregnancy was detected 30 days later. Ovarian follicles diameters and numbers were also compared. Our results revealed that obese goats before restricting diets had the highest BF (2.69±0.39 mm; P≤0.0001), corpus luteum diameter (CL, P<0.01; 1.05±0.12); leptin concentration (P<0.01; 1.79±0.13); total follicles (5.89±0.27; P<0.0001), number of large follicles (P<0.05; 1.45±1.24), medium follicles (P<0.01; 1.55±0.74). After diet restriction, obese and moderate BF goats had nearly the same BF, P4, and leptin concentration. Compared to goats with moderate BF, replacing concentrated ration with green clover for 30 days increased CL diameter, area, total ovarian activity, number of large and medium follicles, and the diameter of large follicles. Goats of moderate BF, obese dietary restricted, and lean ones had 46%, 31%, and 23% pregnancy rates respectively. In conclusion, obesity can be detected by determining BF and leptin hormone. Obesity is associated with disturbed leptin, insulin and ovarian hormones, ovarian follicle growth, luteal development as well as reduced pregnancy rates. Diet free from concentrated reduced back fat and improved pregnancy outcomes.
